Conditional Format Help

[Ayo]

How do I write a conditional format that applies to
"=$N$13:$N$22,$N$31:$N$40" where If $L13<$N13 fill the cell RED. This is
what I have in the Format values where this formula is true box:
"="$L13<$N13". But it doesn't work. Any ideas?

Thanks

 

[Amylou]

Try getting rid of the quotation marks